Please Carefully Check All Pictures and Part Numbers in the Listing to Make Sure It's the Correct Product you Need

Part Number:
For Leroy Somer AEM220RE008 

For FG Wilson Olympian 954-261 

Applications:
For Leroy Somer Alternator Frames LS 42 to LS 54 

For FG Wilson Generator Sets

For Caterpillar Generator Sets

For Olympian Generator Sets

For SDMO Generator Sets

For Kohler Generator Sets

For Waukesha Generator Sets

Package Included: Automatic Voltage Regulator AVR x 1

Product Information:
R731 Automatic Voltage Regulator
Input Voltage
High voltage tap (400V):340V ±5% to 480V ±5%
Medium Voltage tap (230V):200V ±5% to 240V ±5%
Low voltage tap (110V):90V ±5% to 140V ±5%
Voltage Droop
Current sensing:C.T. for // operation
Location:standard line 1(U), option line 2(V)
Current
MAX. continous current:1.3A
Norminal current:1A
MAX. current for 10s:10A

The R731 is an analogic Automatic Voltage Regulator with transistor.
The voltage sensing is done with three 24VA single phase transformers.
The R731 module is designed to be installed vertically next to the voltage regulator

It is a Replacement Part, Not Original Part. But It Can Work Good For You